Dishwashing apparatus



Feb. 7, 1928. 1,658,413

E.. J. PATELSKI DISHWASHING'APPARATUS Filed Dec. 1'?. 192s ssheets-sheet 1 Feb. 7, 1928. 1,658,413

E. J. PATELSKI.

DISHWASHING APPARATUS Filedvnec. 1'7. 192s s sheets-sheet s Patented Feb. 1928.

'UNITED STATES,

ERICH J'. PATEISKI, OF CHvICAGO, ILLINOIS.

DISHWASHING APPARATUS. v

Application mea December '17, 192s. serial m. 631,181.

This invention relates to improvementsA in dishwashing apparatus, andmore particularlyto a novel adaptation of a power drivenwatercirculating device to a sink, in which'.

the bowl serves as the dish receptacle during the washing operation. p

'Among the objects of theinvention, is to provide an elicient andpractical power driven agitating unit adapted to vcirculate the body ofthe cleansing water in a mannei` to eil'ectively and thoroughly cleansethe dishes.

A further object of the invention is to provide a sink equipped with awater circulating apparatusiso arranged and designed as toV be entirelyseparate from the bowl, thus permitting the sink to be available at alltimes, for usesother than the washing of dishes.

A further object of the invention is to provide a drying compartment asa part of the sink together with means for circulating the air throughthe drying compartment by a positively driven fan forminga part of thewater agitating mechanism.

A preferred embodiment of the invention is clearly shown in theaccompanying drawin in which,-

igure 1 is a view in vertical section through a sink especially designedfor the purpose and equipped with the water agitata 1n and dishdrymgmeans.

igure 2 is a top plan view of one end portion of the sink in which thebowl is located and showing the water agitatin'g apparatus in horizontalsection, and

Figure 3 is a view in vertical section taken on line 3 3 of Figure 1.

The sink herein disclosed is preferably of the' cast metal and-enamelform used extensively for kitchen .equi ment, and except for certaindepartures in tlesign made neceary bythe incorporation of thedish-washing apparatus, it includes the usual drain board 1," ,arearpnel 2 extending vertically above the ard, and a bowl 3, with the usual'drain openings 4 4 .in the rear. panel and above the bowl through whichthe faucet connections extend. The sink is sup rted u n the floor 'andagainst the wall o the kitc en by means of le or brackets, whicheveristhe more co'nvenlent,

For reasons hereinafter appearing, the the bowl 3 is fairly deep andpreferably oval in shape, but otherwise similar in all to that of theordinary sink., It has in its bottom wall, a drain 5, communicating withsaid casi the usual tra and drain connections 6, and having a per oratedplate 7, set in flush with the bottom of the bowl.

For obviousreasons the bottom drain is provided with va valve 8, so thatvthe bowl can be filled with water during the'washing operi ation. Inaddition, an overflow outlet 9 lis preferably provided nearthe upperedge of the bowl and in itsrear Wall, said overow outlet being alsoprovided/with avalveV 10 and connected with pipe connections 11 whichlead toa common discharge. The valves of .the bottom and overflow.drains are prefer ably operated by means of a single handle 12 locatednear one end of the sink, said handle being connected with the valves bysuitable operating membs, so arranged that when the valve 8 in thebottom drain is closed,` thevalve in the overlow drain will be open, andvice versa, thereb insuring the proper relative positions of t e valvesat all times. By the use of an overflow, the dan r of the bowloveriowing durin the dishwashing operation is avoided an maintainsv auniform high water level which allows fresh water to iiow into the bowlduring the washing operation, and the grease and particles of foodfloating on the top of the water to be carried of.

-The agitating mechanism is mounted beneath the drain board 1, andcomprisesa motor 13 suspended from the underside of the drain board, bymeans of an inverted base plate 14, a cylindrical casing or chamber 15,opening into the bowl 3, near its bottom, and a circulating member 16mounted within and fixed to a shaft 17 journalled in a suitab e bearing18 at the outerl or closed end of the casing and driven by the'motor.Intermediate the shaft bearing of the casing 15 and the motor ismounteda fan 19 to be used for the circulation of air for the purposeshereinafter to be set forth. p Referrin more in detail to the rotativewater circu atin member 16, the saine comrises a cylindric hollow shell20, somewhatless in diameter vthan the surroundin housing 15, andextending substantially e full length thereof. Cast integral with theouter urace of ltlhe shell is lhelical laes21,treeinnum r, metricallyabout the' shell and extenlyillll substantially the full length of theshe from a point short of its forward end and projecting beyond its rearend into a adjacent the closed en d of the casing, w 'ch is sli htlyrounded or spherical in contour. On t e inside ofthe shell is a somewhatsimilar arrangement of blades 22 cast. integral with the shell and'` anaxial sleeve or bushing 23, which has fixed connection with the end ofthe drive shaft 17.

The internal blades 22 are two in number and likewise helical, but theirpitch or lead is the reverse of that of the external blades 21, thus ifit be assumed that the shell is rotated in a .body of water, one set ofblades will move the water one direction and the other set in theopposite direction. As will presently appear, this is the intendedaction of the blades, namely, that the internal blades drive the waterinwardly through the shell to the rear of the housing 15, and thencercarried forwardly again by the external blades 21, and discharged fromthe casing. 20. This constant indux and discharge oi the body of waterfrom the bowl 3 promotes` the circulation of water among the disheswhich eects the cleaning action.

As already pointed out, the housing 15 lits within an opening in thebowl, preferably by means of a threaded flange and shoulder connectionso that the parts can be readily disassembled. Theentrance opening tothe casin is covered by erforated plate or cap 24 w ich prevents sdlidmatter from being carried into the casing and otherwise divides thecasing and the bowl. The plate 24'is provided with an annular tlange 24awhich ts within the opening to the casing and has screw threadedconnection with the open end thereof. Moreover, the platev acts as abearing for the\ shaft of the cylindric rotor, there being supported atthe center of the plate an oilless bearin 25. The face of the plate 25is substantial y flush with the side wall of the bowl, although the bowlis preferably provided with depressions or recesses 3, 3a on either sideof the plate which expose portions of its annular llange 24a.

.A definite arrangement of apertures or slotsarepuformed in the plate24. As clearly shown in Figures 2 and 3, there are three oups ofconcentric slots in the circular ace of the plate, the innermost andintermediate groups 26 and 27 being in alignment with the internalpassage of the shell 20,

Jwhereas the outermost group 28 is in alignment with'the annular space,urrounding the shell. Between the outer an the intermediate grou sofopenings 28 and 27, is an 29, of the annular divi ing wall or ringsame diameter as the cylindric shell ofthe rotor 20, therforward edge ofthe latter being in close proximity thereto with but f a 'slightclearance between. In addition to the openin s in the front face of theplate there'are a two series of lateral openings 30, 30 in the annularflange 211'?s of the plate, these openings facing radially toward the "Idepressions 3, 3* in the bowl. The lateral astenia groups of openings 30serve the same purpose as the outer concentric group 28, since they alsocommunicate with the space surrounding the rotor 16.

The action of the agitating mechanism and the mannerin which thecleaning action is accomplished will be understood from thefollowingzThe bowl is first filled with a qnantity of soapy water, thebottom drain being closed and in which posit-ion the over- :flow drainis open. The motor is then started and drives the rotor in acounterclockwise direction so that the internal blades 22 function todraw the water into the housing through the registering groups ofopenings 26 and 27. Reaching the rear of the housing the water is pickedup by the external blades 21 and carried forwardly along the outerpassage and discharged into the bowl, the current bein divided betweenthe outer annular group o' openings 29 and the lateral groups 30, 30.Due to the oval shapeb the bowl and the curved depressions 3a 3a thewater thus discharged into the bowl, sets up a series of cross currentsand eddies, throughout the ventire volume of water. Manifestly, it isimpossible to accurately trace the various currents that would be setup, but some idea can be had of the` Y thorough a 'tation that isproduced, from the fact t at the streams issue from both sides of theplate in a radial direction as well as longitudinally through the outercircular row of o enings, so that there is a multitude of c n lotingcurrents which produce the desird action for effective cleansing. Theoval shape of the bowl further assists in promoting eective agitation inv that it prevents any tendency toward a con certed movement about thecenter of the 105 bowl, as would be present if it were circular, thusbreaking up any general movement of the water into many small whirlpoolsor eddies. A

Provision is also made for rapid drying of the dishes, and whilethedrying means may or may not form a part of the washing apparatus itforms a convenient addition thereto and makes a complete apparat-us forldish-washing.

The drying of the dishes is made possible by the provision of a housing31, which not only encloses the motor and other parts of theagitatingmechanism, but'provides a space therebelow in which the dishes may beplaced after Washing, a wire basket being ordinarily used for handlingthedishes, both in washing anddrying.

The-housing 31 is constructed more or l less like an oven, with side andbottom walls, and which depends from the under side of the/ drain boardand below vthe sink oapron 32, and the bowl 3i. As already suggested,the upper` part of the housing encloses the moving parts and the lwerpart forming 139 f is a series of transverse ouvers 34 with o eningsleading to the space below. T ese louvers incline toward the fan 19, fordirecting the air` currents created thereby into the drying space. Abaiiie 35 is also located in the upper'fspa-ce which extends from apoint above the fan downwardly and toward the far corner of the spaceabove the partition wall 33. I-Ioles or other forms of openings 36 and37, are located at suitable places in the housing walls or above andbelow the' S partition wall 33, so as to provide for 'the necessarycirculation of air, which is kept in motion by the fan 19. A heatingcoil 38 may be conveniently placed inthe bottom of the drying s ace forfacilitating the drying operation. ccess to the drying space, as Well asto the mechanism above is had by means of a door 39, in the front Wallof the housing. This door is hinged along its bot-- tom (or side ifpreferred), and otherwise is similar to the ordinary oven door.

The apparatus thus disclosed provides a compact -and unitary sinkequipment for household use, having the advantage of combining in asingle fixture 'all of the require ments for mechanical dish-washing andwithout interfering with its'use for purposes for which the ordinarysink may be used. The agitating mechanism is completely removed from thesink bowl, thus leaving the latter free and open at all timesso that itcan be kept clean, as wellY as usable for any purpose other than washingdishes. In short,`the use of an apparatus embodying the presentinvention makes -it possible to incorporate a mechanical dishwashingapparatus in a sink without any ofthe objectionable features that arepresent in other devices for this purpose. A

I claim as my invention:

1. In an apparatus of the character described, the combination of anopen receptacle, a cylindric casing communicating at one end with saidreceptaclel and closed at its opposite end, a rotor mounted in saidcasing and comprising an open ended cylindric shell of reduced diameterarranged axiallyv of said casing, and dividing the space therein ininternal and `external passages connected vthe, closed end thereof, saidshell having helical impeller blades extending lengthwise the outer4surfaces thereof and radially of-said external passage.

2. In an apparatus ofthe character described, the combination of areceptacle, av

cylindric casing communicating at one end with said receptacle andclosed at its opposite end, a rotor in said casing comprising an openended cylindric shell of less diamevter than said casing and extendingaxially Ythereof tol form internal and external pasand internal passagescommunicatin sages connected at the closed end of said l casing, saidshell having helical impeller.

blades of opposite lead extending lengthwise of the inner and outerfaces thereof and radially of said passages.

3. In an apparatus of the character .de scribed,- the combination of areceptacle, a cylindric casing communicating at one end with saidreceptacle and closed at its opposite end, a rotary impeller extendingaxially of said casing and comprising. an open ended cylindric. shellextending from the open end to a point adjacent its closed end, saidshell being spaced radially inward from said 'casing to form an internalpassage and an annular external passage connected beyond the inner Aendof Said shell, and series of helical impeller blades of opposite leadextending longitudinally of the inner and said passages.

4. In an apparatus of the character de-Y scribed, the combination'of areceptacle, a cylindric casing communicating at one end with saidreceptacle and closed at its opposite end, a rotor comprising an openended cylindric shell extending axially of said casing andforminginternal andexternal passages connected by a space at the closedend of Said casing, and helical impeller blades of opposite leadextending along the outer and inner surfaces of said shell and radiallyof said passa es, one of said blades projecting into \sai space at theclosed end of said easing, whereby the water in said receptacle is drawninto said casing through one of saidpassages and discharged therefromthrough the other passage.

5. In an apparatus of the character described, the combination 'of areceptacle, a cylindric casing communicating at one end with said.receptacle 'and closed at its opposite end, `a rotor comprising an openended cylindric shell arranged axially of said casing and forming withinsaidcasing externzl wit said 'receptacle at the-open end of said casingand connected with each other at the closed end of said casing, saidshell having series of helical impeller blades of opposite leadextending len hwise of its inner and outer surfaces an radially of saidpassages, one of said series of blades extending beyond theinner end ofsaid shell into the space at the closed end-of said casing:

6. In an apparatus of the character described, the combination of areceptacle, a

cylindric casing communicating at one end` l with said receptacle' andclosed-at its opposite end, a rotor comprising an o en ended cylindricshell arranged axially o said casing and reduced in diameter togformexternal and internal passages communicating with said receptacle at theo en end of said casing an terminating s or:- of the fitting closed endof said casing to provide connecting passage, series of helical impellerblades of opposite leads extending lengthwise of the inner and outersurfaces of said shell and. radially of said passages, and a plate overthe opening to said casing and avmg openings therein registering withsaid external and internal passages.

7. In a dish washing apparatus, the combination bf a bowl, a horizontalcylindric casing opening 'at one end into said bowl ad'acent its bottomand closed at its opposite end, a shaft extending axially 'of saidcasing and through the end wall thereof, a motor operatively connectedwith said shaft exterior said casing, a cylindric shell open at bothends and mountedon said shaft' within said casing, said shelljbeingspaced radially from the inner wall of said casing to form an annularspace therebetween, and inwardly from the closed end of said casing toprovlde a space Connecting said annular space withl theinternal space ofsaid' shell, said shell having a 'series of internal and externalimpeller blades of opposed lead extending radially of'said spaces, theends of one series of blades extending beyond said shell into the spaceat the closed end of said casing.

8.111 a dish washing apparatus, the coinbination of va bowl, ahorizontal cylindric casing opening at one end in to said bowl adjacentits 4bottom and having a concave end wall at its opposite end, a shaftextending axially of said casing and throu h the end wall thereof, amotor operativey connected with said shaft exterior oflsaid casing, acylindric shell open at both ends and mounted on said shaft within saidcasing, said shell being spaced radially from theinner wall of saidcasing to form an annular passage therebetween and terminating short ofthe closed end of said casing'` to provide a space. connecting saidannular passage with the internal passageof said shell, series ofhelical impeller blades of opposedlead extending longitudinally of theinner and outer surfaces of said shell and Aradially of the internal andexternal passages, said outer series of blades extending beyond theinner end of said shell into said space beyond, and

- said passages.l

a plate V p fitting into the open end of said casing and In witnesswhereof, I Vhereunto subscribe my name this 4th day of December, A. D.,1923.

ERICH J. PTELSKI.

